Check the listing for details. CBRN Gas Mask Filter 4PAK Highest Performance NBC Filter On eBay! CAP-1 APPROVED. Condition: New. Listed at 99.99 USD. CBRN 'CAP-1' Approved Gas Mask Filter / NBC 40mm NATO Respirator CanisterVacuum Sealed In Plastic Tub with Airtight Induction Seal (Mil-Spec Packaging) These are BEASTS (Each filter weighs in at 410g) & comes in the best packaging we've seen;We're liquidating a 4pak of these for the price of a single CBRN Approved filter due to 2019/2020 exp date.Check out the attached video showing how well sealed these are! Would you rather have a no-name, unapprovedfilter with ZERO test data or a USA NIOSH tested & CBRN APPROVED filter that's a few years out of date? The choice is yours, but a 250g filter may have as little as 1/3 the carbon of these HEAVY suckers (4pak wgt 5lbs!) NIOSH CAP1 APPROVED - One of the best filters made. Fully CBRN Approved in USA!!These filters cannot be exported because they are considered 'significant military technology' and are subject to the ITAR / US AECA (Arms Export Control Act) We will not ship outside the United States, NO EXCEPTIONS. NOTE: Recently Expired, Tightly Vacuum Sealed, Expiration Date: 09/2019 #045135Manufactured By Scott Health & Safety, 5045135 Excellent, High-End Filter